These erasers are really great for any kind of puzzle books; crossword, Sudoku, word search etc. They erase mistakes cleanly, and do not leave smudges. One thing though; they don't do such a good job on the adult coloring books. Maybe it's the combination of the type of lead and the type of paper. The pencils I use are soft (number #2 or 4#) because they are softer and darker and are used mostly for drawing. A pencil with a harder lead would probably work better.

These erasers are expensive compared to the pink ones, but worth the extra money. they erase well and do not break off. I really like the fact that Blick sells them in a large quantity container. All other searches only had them in 10 packs.

We use this eraser to pull out highlights and clean edges in shading and drawing assignments at the high school level. While nothing is perfect, it's a great value and does a very good job of cleaning and lifting without smearing the graphite. Definitely recommend!

I own scads of pencils with hard erasers,and that includes add on erasers which have hardened. These erasers do not harden. They earase until used up. At less than 20 cents each these are a great deal.

I spent the extra money to get these based upon their description and the Pentel reputation. It was not worth it! They break and wear out just as fast as the cheap pink erasers. Don't waste your money!